c# print barcode zebra printer Replication model in C#.NET

Create Quick Response Code in C#.NET Replication model

Remote procedure call (RPC).

For intrasite replication, the knowledge consistency checker (KCC) on each domain controller helps to automatically generate and optimize a replication topology among domain controllers in the same domain. To accomplish this, the KCC automatically creates connection objects between domain controllers. A connection object is an Active Directory object that represents an inbound-only connection to a domain controller. Under normal conditions, Active Directory automatically creates and deletes

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connection objects. However, you can manually create connection objects to force replication if you are certain the connection is required and you want the connection to persist until you manually remove it.

You can use several different methods to force replication. Microsoft Knowledge Base article 232072, Initiating Replication Between Active Directory Direct Rep lication Partners (available from http://support.microsoft.com), discusses the fol lowing four methods: 1. Using the Active Directory Sites and Services MMC snap-in (Dssite.msc) 2. Using Repadmin 3. Using Replmon 4. Using a script All of these methods, except for using a script, are illustrated in the exercises and examples in this chapter. A sample script for initiating replication named Repli cate.vbs can be found in the \70-294\Labs\05 folder on the Supplemental CD-ROM.

For intersite replication to occur, you must customize how Active Directory replicates information by setting up site links. Site links are logical, transitive connections between two or more sites that mirror the network links and allow replication to occur. Once you have created site links, the KCC will then automatically generate the replica tion topology by creating the appropriate connection objects. It is important to note the difference between site links and connection objects. Site links are used by the KCC to determine replication paths between two sites and must be created manually. Connec tion objects actually connect domain controllers and are created by the KCC, though you can also manually create them if necessary.

If you work for an organization that spans multiple time zones, you must consider this when configuring your site link schedule. Although the site link schedule interface displays the schedule based on local time, this information is stored in Coordinated Universal Time (UTC). This means that someone in another time zone looking at the same schedule will see different link availability. Ensure that when you schedule site link availability for two locations in different time zones, you take into account what is happening at both locations at the scheduled time.

Site Link Transitivity By default, all site links are transitive, which simply means that if sites A and B are linked and sites B and C are linked, then site A and site C are tran sitively linked. Site link transitivity is enabled or disabled by selecting the Bridge All Site Links check box in the Properties dialog box for either the IP or the SMTP intersite transport. By default, site link transitivity is enabled for each transport.

Note If site link transitivity is enabled and connections are created between sites that span firewalls, replication errors will occur if the firewall allows packets to travel only between spe cific domain controllers.

disable site link transitivity:

Site Link Bridges A site link bridge connects two or more site links in a transport where transitivity has been disabled in order to create a transitive and logical link between two sites that do not have an explicit site link. For example, in Figure 5-1, site link Ber-Lu connects the Bern and Lucerne sites. Site link Lu-Zur connects the Lucerne and Zurich sites. Site link bridge Ber-Lu-Zur connects site links Ber-Lu and Lu-Zur. Because site links are transitive by default, it is seldom necessary to create site link bridges. In other words, if site link transitivity is enabled, then manually creating a site link bridge is redundant and has no effect. However, if site link transitivity is disabled, you need to manually create a site link bridge if a transitive link is required to handle your organization s replication strategy.